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March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 1 Original Filgd May 12, 1954 m w m BRUCE H. TINGLEY ATTORNEY March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE 1-8 Sheets-Sheet 2 Original Filed May 12, 1954 llll llll 3 INVENTOR.

E L G W T H E C U R B ATTORNEY.

March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTOR'ING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 3 Original Filed May.l2, 1954 TINGLEY BRUCE BBQ MnN

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B. H. TINGLEY March 24, 1964 KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 4 Original Filed May 12, 1954 noN Nun hVN mm 00? 00M N 9 INVENTOR.

sauce: H. TINGLEY 6N NON nON MON ATTORNEY.

March 24, 1964 B. H. TINGLEY 3,126,153

KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 1.8 Sheets-Sheet 5 i i i ii ATTORNEY.

March 24, 1964 B. H. TINGLEY 3,126,153

KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 l8 Sheets-Sheet 6 ATTORNEY.

March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 7 Original Filed May 12, 1954 AT TO R NEY.

March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 8 Original Filed May 12, 1954 MON ATTORNEL March 24, 1964 B. H. TINGLEY 3,

( KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 18 Sheets-Sheet 9 Y Q In Q r- I- Q Q T V I) FIG. 7.

INVENTOR. BRUCE H.TINGLEY ATTOR NEYv March 24, 1964 a. H. TINGLEY A'EY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE v Original Filed May 12, 1954 18 Sheets-Sheet 1O INVENTOR. BRUCE H. TINGLEY' 1! TIDRNE Y March 24, 1964 B. H. TINGLEY 5 KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 18 Sheets-Sheet 11 mmviox. sauce H. TINGLEY ATTORNEY March 24, 1964 B. H. TINGLEY 3,126,153 KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 INVENTOR. BRUCE H. TINGLEY ATTORNEY.

March 24, 1964 B. H. TINGLEY 53 KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 18 Sheets-Sheet 13 FIG. l2.

INVENTOR. BRUCE H. TINGLEY ATTORNEY:

March 1964' B. H. TINGLEY 26, 53

KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 18 Sheets-Sheet l4 INVENTOR. BRUCE H. T INGLEY ATTORNEY March 24, 1964 B. H. TINGLEY v 3,126,153

KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed Ma 12, 1954 18 Sheets-Sheet 15 INVENTOR. BRUCE H. TINGLEY AT TOR N EY.

March 24, 1964 B. H. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Original Filed May 12, 1954 18 Sheets-Sheet 16 INVENTOR. BRUCE H. TINGLEY ATTORNEY.

March 24-, BL H? TINGLEY' KEY LQCKING? FOR GMLGUENII NG? MACHINE INVENTOR. BRUCE H. Tl NGLEY 1:8 Sheets-Sheet 1'7 E'iJie'dl May; 132 11954;

ATTORNEY.

March 24, 1964 a. 1-1. TINGLEY KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE l8 Sheets-Sheet 18 Original Filed May 12; 1954 INVENTOR. sauce H. TINGLEY ATTORNEY.

United States Patent 3,126,153 KEY LOCKING AND RESTORING MECHANISM FOR CALCULATING MACHINE Bruce Harrison Tingley, Pine City, 'N.Y., assignor, by mesne assignments, to Sperry Rand Corporation, New York, N.Y., a corporation of Delaware Application Sept. 27, 1960, Ser. No. 58,814, which is a division of application Ser. No. 429,277, May 12, 1954, now Patent No. 2,984,411, dated May 16, 1961. Divided and this application Nov. 13, 1962, Ser. No.

3 Claims. (Cl. 235-145) This invention relates to new and useful improvements in key looking and restoring mechanism for calculating machines and has particular reference to improvements in the ten-key key-set type or calculator being a division of my co-pending application Serial Number 58,814, filed September 27, 1960, which application, in turn is a division of my co-pending application Serial Number 429,277, filed May 12, 1954-, now Patent No. 2,984,411 dated May 16, 1961.

The particular machine wherein this invention is embodied is an improvement over the machines disclosed in US. patents to Walter W. Landsiedel 2,203,336; 2,229,-

980; 2,237,881; 2,255,622; 2,688,439 and 2,726,037 in his name as follows:

It is more directly an improvement over Patents Nos. 2,688,439 and 2,726,037, more especially the latter which shows a calculator adapted to perform multiplication by a short cut method.

In the Patent'2,726,037 provision was made for short out multiplication wherein the multiplicand was entered in the usual fashion and spaced in accordance with the number of digits in the multiplier. Then a short cut key was depressed, after which the multiply lever was pushed rearwardly and held for the proper number of cycles for each digit of the multiplier. As before, the'machine would cycle through a blank and total stroke and print the product. The multiplica-nd and the first multiplier digit were printed at the end of cycling of the first digit. Subsequent multiplier digits were printed at the end of their respective series of cycles.

To facilitate the operation a dial was provided which indicates the successive cycles, so that the multiply lever could be released at the proper time.

The parent application S.N. 429,277, new Patent No. 2,984,411, is directed to the provision of mechanism to eliminate the dial and the lever altogether, and to pro vide a series of multiplier keys in addition to the regular keyboard so that after the multiplicand is entered and properly spaced it is merely necessary to press the desired multiplier key corresponding to the multiplier digit being entered into the machine, and the machine will take over and automatically cycle the proper number of times and then automatically take a total and print the product. There are no dials to 'watch or levers to hold and release. Just press down the proper key for the successive digits to be cycled.

The parent application SN. 58,814 is directed to the provision of improved mechanism for the printing of multiplier and quotient digit symbols in response to selective actuation of multiplier keys.

The present invention is directed to the provision of improved key locking and restoring mechanism.

The preferred form of the invention is shown in the accompanying drawing with the cover casing removed, and in which FIG. 1 is a front elevation of the multiplier keyboard;

FIG. 2 is a rear elevation of the multiplier keyboard removed from the machine:

FIG. 3 is a front elevation of the machine with the ice 2 multiplier keyboard removed, and with certain parts at the sides shown in section;

FIGS. 4 and 4A taken together constitute a plan view of the machine with the casing and the keyboard removed, but wit-h the multiplier keyboard in position;

FIGS. 5 and 5A taken together constitute a Vertical longitudinal section taken approximately on the line 55 of FIGS. 4 and 4A;

FIGS. 6 and 6A taken together constitute a left side elevation of the machine;

FIGS. 7 and 7A taken together constitute a right side elevation of the machine;

FIG. 8 is a partial perspective view of the front end of the machine showing the main keyboard and the multiplier keyboard;

FIG. 9 is a perspective view of certain parts having to do with the operation of the two through five keys with some portions of it shown in exploded relation;

FIG. 9A is a detail perspective showing some of the parts of FIG. 9 in their normal relation;

FIG. 10 is an enlarged perspective of an operating slide and associated parts;

FIG. 11 is a perspective of the multiplier key restoring mechanism;

FIG. 12 is a perspective, with parts exploded, of certain parts of the mechanism of FIG. 11;

FIG. 13 is an exploded perspective of mechanism in short cut multiplication particularly the escape-ment mechanism and the non-print control mechanism;

FIG. 14 is a perspective of mechanism involved in automatic blank stroke and total taking operations;

FIG. 14A is a detail of the mechanism of FIG. 14;

FIG. 15 is a perspective of mechanism involved when the zero or one key are depressed, with some parts exploded and some omitted;

FIG. 16 is a perspective of the mechanism for operating the quotient rack with some parts exploded;

FIG. 16A is a perspective of other parts of the mechanism of FIG. 16 with some parts exploded and some others omitted;

FIG. 16B is a perspective detail of FIG. 16 showing mechanism to backspace and step up the M and Q rack five positions;

FIG. 160 is a panti-al rear perspective of the latches and bails employed in connection with the blocking and holding of the M and Q rack;

FIG. 16D is a detail perspective drawn out of FIG. 16 to avoid confusion;

Former General Structure The machine on which the herein improvements are i imposed is of the type shown in the cited references above,

especially that shown in Patent 2,726,037 and involves a base plate 30, upper and lower keyboard plates 31 and 32, outer vertical plates 33 and 34 and inner vertical plates 35 and 36 suitably braced (see FIGS. 4 and 5).

The regular digit keys 37 have stems 38 which are depressed to set pins 39 on a pin carriage 40 which is escaped step by step in the usual manner by means not shown herein, but shown in FIG. 6 of Patent 2,726,037 above. The pin carriage 46 (FIG. 5) is backspaced by means of pawl 41 (FIG. 3) cooperating with backspace rack 42 in the usual manner through operation of arm 41' and backspace shaft 43. The set pins 39 ane, when set, disposed in the path of lips 44 on slides 45 cooperating with adding racks 46, the teeth 47 of which, mesh with the accumulator wheels 48 (FIG. 5). These racks also mesh with pinions (not shown) to elevate the type racks 49 (FIGS. 4 and 5). The printing hammers 50 are fired generally in the manner as set forth in FIG. 1 of Patent 2,203,336. The machine is driven by an electric motor (not shown) but generally as shown in FIG. 6 of Patent 2,229,980 above, and this action oscillates bellcrank 51 (FIG. 7A) pivoted at 52 and having a gear sector 53 meshing with a similar sector :54 fixed to main shaft 55. On the opposite end of the main shaft 55 is the backspace cam 56 (FIG. 6A) described and shown as part 194- (FIG. 3 of Patent 2,726,037). There is also shown the division lever of key 57 (FIG. 6) and its associated elements which are in the main the same as in the above Patent 2,726,037 (FIG. 3 thereof). The general structure and operation of the present machine is in many respects the same as the patent above, and any changes and alterations thereof will be taken up in connection with the description of the structure and operation of the improvements which constitute this invention, and which are in one or another manner related to the regular elements.

Structure and Operation of Improvements It should be recalled that in the machine of the invention, instead of pushing a multiply lever and watching a dial, it is merely necessary, after the multiplicand has been properly entered in the pin carriage, to press the proper multiplier digit key to start the machine and multiply by that digit. If that is the only multiplier digit involved in the operation, the machine will automatically proceed to take a total. Otherwise, the next digit key is depressed until the last multiplication has taken place, whereupon the machine will proceed to take and print the total. This last operation involves two cycles. When the first multiplier digit is cycled, on the last cycle of this series of multiplication cycles, the digit involved and the multiplicand are printed. Further multiplication cycles for other digits of the multiplier will involve only the printing ofthe multiplier digit until the printing of the total or product as above stated.

A main feature of the present invention resides in a multiplier keyboard which is attached to the front of the machine and supports a plurality of multiplier digit keys 58 representing digit values from to 9. These are supported on a C shaped frame having a vertical wall 59 (FIG. top and bottom rearwardly extending walls 60 and 61. The rear of the top wall 60 is secured to an angle member having apertured ears 62 permitting the frame to be fastened by means of screws 64 to a cross bar 63 on the front of the main body of the machine. Secured to the bottom wall 61 is a member 65 having dependent L-shaped ends apertured on their base portions and screwed to the base plate 30 of the machine (FIG. 6). The opposite vertical edges of the wall 59 have rearwardly extending flange plates 66 (FIGS. 1, 2 and 5). The t. shaped members 65 have forwardly extending flanges 67 acting as journals for certain shafts and rods later mentioned.

The multiplier keys 58 have stems 68 which are guided in slots 69 (FIG. 8) in the top and bottom walls 69 and 61 of the unit frame. The enlarged heads of the keys are guided in openings (not shown) in a cross plate 70 (FIG. 2) supported above and parallel to the top wall 60 of the frame of the unit. The stems 68 have forwardly projecting fingers 71 extending through slots 72 in the front wall 59 of the C frame to prevent angular turning of the stems (FIG. 1). The lower portion of the keys stems 68 having laterally turned ears 73 (FIG. 13) to which are pivoted pawls 74 to the upper end of which are connected springs 75 fastened to the stems 68. In general the depression of a two to five key 58 (FIG. 9) will cause the pawl 74 to bear down on one arm 76 of a bellcrank, the other arm 77 of which acts as a block arm and, when a key is depressed, is disposed in the path of movement of forwardly extending spaced ears 78 of a step-by-step slide member 79. The arm 76 is positioned in a comb plate 85 which is spring urged to the right by a spring 82 (FIG. 2). When an ear 78 contacts the block arm 77, which is disposed in its path, it moves the arm 77 and the comb plate 85 which are pivotally and slidably left (FIG. 9) the pawl 74 will yield to the left thus removing pressure from the key stem. The key stem is now free to restore when unlatched. It will be seen from FIGS.

, 4A and 8 that bails 83 are connected respectively between the arms 76 associated with the keys 2 and 9, the keys 3 and 8, the keys 4 and 7, the keys 0 and 1, and the keys 5 and 6. It can'be perceived from FIGS. 1 and 8 that there are ten arms 76, but only five block arms 77. Therefore,

it is equally obvious that the operation keys 0 and 1 will set up a common block arm; the operation of key 9 will set up the block arm associated with key 2; the operation of key 8 will set up the block arm associated with key 3; the operation of key 7 will set up the block arm associated with key 4; and the operation of key 6 will set up the block arm associated with key 5. This is for the'purpose of setting up multiplication by the complementary or short cut method, as is explained in the aforementioned parent Patent No. 2,984,411.

Mechanical Operation When Keys 2 to 5 Are Operated As a multiply key, such as for the digit three (FIGS. 9 and 9A) is depressed, the pawl 74, pivoted to the key stem 68, contacts and depresses arm 76 and causes its block arm 77 to be positioned in the path of ears 78 on slide 79. The arm 76 also lies in a slot 84 in a comb plate 85 which is also pivotally mounted on rod 80. There are five slots 84 in the comb plate 85 to receive arms 76 related to keys 1, 2, 3, 4 and 5. At its ends the comb plate has forwardly extending arms 86 and 87 which respectively are adapted to operate the motor drive control bellcrank 88 (FIG. 9) and the multiply non-print bellcrank 89 (FIG. 10) through the respective offset arms 90 and 91 as said comb is rocked by the depression of a key (FIGS. 9 and 15).

As the multiply non-print bail 89 rotates clock-wise (FIG. 10) it will position the multiply mechanism operating slide 92 rearward (FIG. 10). The slide 92 has an ear 93 thereon. Slidably attached to the front of wall (FIG. 1) by slots 94 and studs 95 FIGS. 1, 8 and 10 is the key stem bellcrank operating slide 79. The right hand lower edge of slide 79 has teeth 96 engageable by the end of a latch pawl 97 pivoted on the wall 59 and normally urged into engaging relation with the teeth by a spring 98. An upright arm 99 of the pawl 97 has a stud 100' extending rearwardly through a hole 101 in Wall 59. Back of wall 59 is an elongate link 102 slotted at 103 to ride on a stud 104 (FIG. 10) fastened to the back of wall 59. This link at its right end has an upright finger 105 which is adapted to engage the stud 100 to move it to the right and depress the pawl 97 against the action of spring 98 fastened at one end to pawl 97 and at the other to. the front face of wall 59. receive the end of arm 107 of a bail 108 rotatable on rod 109 which is supported from upperwall 60 and cross plate 70 (FIG. 11). This bail 108 also has an extension 110 at its upper end which normally lies in front of car 93 on link 92. When the link 92 is moved rearward the ear follows and bail 108 is turned by reason of the pull of a spring 111 (FIG. 10) fastened at one end to link 102 and at the other end to the back of wall 59. It will thus be seen that upon continued movement of link 92 to the rear, extension 110 will be rotated by spring 111 acting on slide 102, thus permitting arm 105 to follow,

relieving the stud 100 of pressure from arm 105 thus.

allowing pawl 97 to be swung by spring 98 into-place to engage the teeth of the slide 79. When the link 92 moves One end of link 102 is slotted to t 

1. IN A MACHINE OF THE CLASS DESCRIBED, A MULTIPLIER DIGIT KEY, SAID KEY BEING DEPRESSABLE INTO AN OPERATED CONDITION FROM A NORMALLY UNOPERATED RAISED POSITION, A KEY RETURN BAR PIVOTABLY MOUNTED FOR ACTUATION INTO ENGAGEMENT WITH SAID DIGIT KEY TO RAISE SAID KEY FROM SAID DEPRESSED POSITION BACK TO SAID RAISED POSITION, A ROCKABLE MEMBER, A SPRING YIELDABLY CONNECTING SAID ROCKABLE MEMBER TO SAID RETURN BAR AND BIASING SAID RETURN BAR TO A POSITION OF NON-ENGAGEMENT WITH SAID DIGIT KEY, A CYCLICALLY OPERABLE LINKAGE, AN ACTUATABLE BLANK STROKE BAIL, AND MEANS RESPONSIVE TO ACTUATION OF SAID BLANK STROKE BAIL TO MECHANICALLY INTERCONNECT SAID LINKAGE AND SAID ROCKABLE MEMBER, MOVEMENT OF SAID LINKAGE ROCKING SAID ROCKABLE MEMBER AND, IN TURN THROUGH SAID SPRING, ACTUATING SAID RETURN BAR INTO KEY ENGAGING POSITION TO ACTUATE YIELDABLY SAID MULTIPLIER KEY BACK TO RAISED CONDITION. 